Axon Enterprise (AXON) had the highest return in October 2003 by a large-cap US stock, returning 136.5%.

ASSET	MONTH	% RETURN
Axon Enterprise (AXON)	October 2003	136.53%
Akamai Technologies (AKAM)	October 2003	80.78%
Netflix (NFLX)	October 2003	71.61%
Alamos Gold (AGI)	October 2003	66.42%
AXIA Energia (AXIA)	October 2003	50.61%
Kratos Defense & Security Solutions (KTOS)	October 2003	45.59%
Tower Semiconductor (TSEM)	October 2003	45.52%
Rambus (RMBS)	October 2003	45.14%
CoStar (CSGP)	October 2003	44.23%
Centrais Electricas Brasileiras (EBR)	October 2003	41.46%
Centrais Elétricas Brasileiras SA - Eletrobrás (EBR.B)	October 2003	39.56%
Advanced Micro Devices (AMD)	October 2003	36.2%
Deckers Outdoor (DECK)	October 2003	35.61%
Microchip Technology (MCHP)	October 2003	34.44%
ASML Holding NV ADR (ASML)	October 2003	33.16%
Nova (NVMI)	October 2003	33.03%
WESCO International (WCC)	October 2003	31.62%
Carlisle Companies (CSL)	October 2003	31.54%
Williams-Sonoma (WSM)	October 2003	30.95%
Amkor Technology (AMKR)	October 2003	30%
Tractor Supply (TSCO)	October 2003	29.99%
Tapestry (TPR)	October 2003	29.93%
F5 Networks (FFIV)	October 2003	29.72%
Wipro Limited ADR (WIT)	October 2003	29.67%
Southern Copper (SCCO)	October 2003	29.36%

Large-cap stocks are treated as having a market cap of $10B+.